Dhammapada Verses 133 and 134
The Story of Thera Kondadhana
Since the day Kondadhana was admitted to the Order, the image of a female was always following him. This image was seen by others, but Kondadhana himself did not see it and so did not know about it.
When he was out on an alms-round, people would offer two spoonfuls to him, saying, "This is for you, Venerable Sir, and this is for your female companion." Seeing the bhikkhu going about with a woman, people went to King Pasenadi of Kosala and reported about the bhikkhu and the woman. They said to the king, "O king! Drive out the bhikkhu, who is lacking in moral virtues, from your kingdom." So the king went to the monastery where that bhikkhu was staying and surrounded it with his men.